ina2332低功耗单电源 CMOS 仪表放大器.docx
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ina2332低功耗单电源CMOS仪表放大器
INA332
INA2332
SBOS216B–SEPTEMBER2001-REVISEDOCTOBER2006
Low-Power,Single-Supply,CMOSINSTRUMENTATIONAMPLIFIERS
FEATURES
●DESIGNEDFORLOWCOST
●HIGHGAINACCURACY:
G=5,0.07%,2ppm/︒C
●GAINSETWITHEXT.RESISTORSFOR>5V/V
●HIGHCMRR:
73dBDC,50dBat45kHz
●LOWBIASCURRENT:
0.5pA
●BANDWIDTH,SLEWRATE:
2.0MHz,5V/μs
●RAIL-TO-RAILOUTPUTSWING:
（V+）–0.02V
●WIDETEMPERATURERANGE:
–55︒Cto+125︒C
●LOWQUIESCENTCURRENT:
490μAmax/chan
●SHUTDOWN:
0.01μA
●MSOP-8SINGLEANDTSSOP-14DUALPACKAGES
DESCRIPTION
TheINA332andINA2332arerail-to-railoutput,low-powerCMOSinstrumentationamplifiersthatofferwiderange,single-supply,andbipolar-supplyoperation.Usingaspecialmanu-facturingflow,theINA332familyprovidesthelowestcostavailable,whilestillachievinglow-noiseamplificationofdif-ferentialsignalswithlowquiescentcurrentof415μA（drop-pingto0.01μAwhenshutdown）.Returningtonormalopera-tionwithinmicroseconds,thisINAcanbeusedforbatteryormultichannelapplications.
Configuredinternallyinagainof5V/V,theINA332offersflexibilityinhighergainsbychoosingexternalresistors.
APPLICATIONS
●INDUSTRIALSENSORAMPLIFIERS:
Bridge,RTD,Thermocouple,Position
●PHYSIOLOGICALAMPLIFIERS:
ECG,EEG,EMG
●A/DCONVERTERSIGNALCONDITIONING
●DIFFERENTIALLINERECEIVERSWITHGAIN
●FIELDUTILITYMETERS
●PCMCIACARDS
●AUDIOAMPLIFIERS
●COMMUNICATIONSYSTEMS
●TESTEQUIPMENT
●AUTOMOTIVEINSTRUMENTATION
TheINA332rejectslinenoiseanditsharmonicsbecausecommon-modeerrorremainslowevenathigherfrequencies.
HighbandwidthandslewratemaketheINA332idealfordirectlydrivingsamplingAnalog-to-Digital（A/D）convertersaswellasgeneral-purposeapplications.
Withhighprecision,lowcost,andsmallpackages,the
INA332outperformsdiscretedesigns.
Additionally,becausetheyarespecifiedforawidetempera-turerangeof–55︒Cto+125︒C,theINA332familycanbeusedindemandingenvironments.
R1R2
VREF
40kΩ
G=5+5（R2/R1）
10kΩ
10kΩ
40kΩ
RG
INA332
INA2332
ChA
VIN–
VIN+
A1A3
A2
VOUT
ChB
V+V–
Shutdown
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.
Copyright©2001-2006,TexasInstrumentsIncorporated
ABSOLUTEMAXIMUMRATINGS
（1）ELECTROSTATIC
SupplyVoltage,V+toV–....................................................................7.5V
SignalInputTerminals,Voltage
（2）.....................（V–）–0.5Vto（V+）+0.5VCurrent
（2）.....................................................10mA
OutputShort-Circuit（3）..............................................................ContinuousOperatingTemperature..................................................–55︒Cto+125︒CStorageTemperature......................................................–65︒Cto+150︒CJunctionTemperature....................................................................+150︒C
NOTES:
（1）Stressesabovetheseratingsmaycausepermanentdamage.Exposuretoabsolutemaximumconditionsforextendedperiodsmaydegradedevicereliability.
（2）Inputterminalsarediode-clampedtothepower-supplyrails.Inputsignalsthatcanswingmorethan0.5Vbeyondthesupplyrailsshouldbecurrentlimitedto10mAorless.（3）Short-circuittoground,oneamplifierperpackage.
DISCHARGESENSITIVITY
ThisintegratedcircuitcanbedamagedbyESD.TexasInstru-mentsrecommendsthatallintegratedcircuitsbehandledwithappropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.
ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.
PACKAGE/ORDERINGINFORMATION
（1）
PRODUCT
PACKAGE-LEAD
PACKAGEDESIGNATOR
TEMPERATURERANGE
SPECIFIEDPACKAGEMARKING
ORDERINGNUMBER
TRANSPORTMEDIA,QUANTITY
Single
INA332AIDGK
"
MSOP-8
"
DGK
"
–55︒Cto+125︒C
"
B32
"
INA332AIDGKTINA332AIDGKR
TapeandReel,250
TapeandReel,2500
Dual
INA2332AIPW
"
TSSOP-14
"
PW
"
–55︒Cto+125︒C
"
2332A
"
INA2332AIPWTINA2332AIPWR
TapeandReel,250
TapeandReel,2500
NOTE:
（1）Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdatasheet,orseetheTIwebsiteat.
PINCONFIGURATION
TopView
INA332
RG
VIN–
1
8
2
7
3
6
4
5
VIN+V–
RGA
1
INA2332
14
ShutdownA
Shutdown
VIN–A
2
13
VOUTA
V+
VIN+A
3
12
REFA
V–
4
11
V+
VOUT
VIN+B
5
10
REFB
REF
VIN–B
6
9
VOUTB
RGB
7
8
ShutdownB
Dual,TSSOP-14（PW）
MSOP-8（DGK）
ELECTRICALCHARACTERISTICS:
VS=+2.7VTO+5.5VBOLDFACElimitsapplyoverthespecifiedtemperaturerange,TA=–55︒CTO+125︒CAtTA=+25︒C,RL=10kΩ,G=25,andVCM=VS/2,unlessotherwisenoted.
PARAMETER
CONDITION
INA332AIDGKINA2332AIPW
UNITS
MIN
TYP
MAX
INPUT
InputOffsetVoltage,RTI
OverTemperatureVOSTemperatureCoefficientdVOS/dTvsPowerSupplyPSRR
OverTemperature
Long-TermStability
InputImpedance
InputCommon-ModeRange
Common-ModeRejectionCMRR
OverTemperature
Crosstalk,Dual
VS=+5V
VS=+2.7Vto+5.5V
VS=2.7VVS=5V
VS=5V,VCM=0.55Vto3.8VVS=5V,VCM=0.55Vto3.8VVS=2.7V,VCM=0.35Vto1.5V
0.35
0.55
60
60
±2
±5
±50
±0.4
1013||3
73
73
114
±8
±9
±250
±260
1.5
3.8
mV
mV
∝V/︒C
∝V/V
∝V/V
∝V/month
Ω||pFV
VdBdBdBdB
INPUTBIASCURRENT
BiasCurrentIB
OffsetCurrentIOS
VCM=VS/2
±0.5
±0.5
±10
±10
pA
pA
NOISE,RTI
VoltageNoise:
f=10HzeN
f=100Hz
f=1kHz
f=0.1Hzto10Hz
CurrentNoise:
f=1kHziN
RS=0Ω
280
96
46
7
0.5
nV/√HznV/√HznV/√Hz
∝Vp-pfA/√Hz
GAIN
（1）
GainEquation,ExternallySet
RangeofGain
GainError
vsTemperature
Nonlinearity
OverTemperature
G>5
G=5
G=25,VS=5V,VO=0.05to4.95
5
G=5+5（R2/R1）
±0.07
±2
±0.001
±0.002
1000
±0.4
±10
±0.010
±0.015
V/V
%
ppm/︒C
%ofFS
%ofFS
OUTPUT
OutputVoltageSwingfromRail
（2）
OverTemperature
CapacitanceLoadDrive
Short-CircuitCurrentISC
G≥10
50
50
SeeT
25
ypicalCharacteris
+48/–32
tics（3）
mV
mVpFmA
FREQUENCYRESPONSE
Bandwidth,–3dBBWSlewRateSRSettlingTime,0.1%tS
0.01%
OverloadRecovery
G=25
VS=5V,G=25
G=25,CL=100pF,VO=2Vstep
50%InputOverloadG=25
2.0
5
1.7
2.5
2
MHz
V/∝s
∝s
∝s
∝s
POWERSUPPLYSpecifiedVoltageRangeOperatingVoltageRange
QuiescentCurrentperChannelIQ
OverTemperature
ShutdownQuiescentCurrent/ChanISD
VSD>2.5（4）
VSD<0.8（4）
+2.7
+2.5to+5.5
415
0.01
+5.5
490
600
1
VV
∝A
∝A
∝A
TEMPERATURERANGESpecified/OperatingRangeStorageRange
ThermalResistance⎝JA
MSOP-8,TSSOP-14SurfaceMount
–55
–65
150
+125
+150
︒C
︒C
︒C/W
NOTES:
（1）Doesnotincludeerrorsfromexternalgainsettingresistors.
（2）Outputvoltageswingsaremeasuredbetweentheoutputandpower-supplyrails.OutputswingstorailonlyifG≥10.Outputdoesnotswingtopositiverailifgainislessthan10.
（3）Seetypicalcharacteristiccurve,PercentOvershootvsLoadCapacitance.（4）Seetypicalcharacteristiccurve,ShutdownVoltagevsSupplyVoltage.
TYPICALCHARACTERISTICS
AtTA=+25︒C,VS=5V,VCM=VS/2,RL=10kΩ,andCL=100pF,unlessotherwisenoted.
80
70
60Gain=500
GAINvsFREQUENCY
120
100
COMMON-MODEREJECTIONRATIO
vsFREQUENCY
Gain（dB）
40
30
20
10
0
–10
–20
10
Gain=100
Gain=25
Gain=5
1001k10k100k1M10MFrequency（Hz）
CMRR（dB）
80
60
40
20
0
101001k10k100k
Frequency（Hz）
100
90
80
70
PSRR（dB）
60
50
40
30
20
10
0
1
POWER-SUPPLYREJECTIONRATIO
vsFREQUENCY
101001k10k100k
Frequency（Hz）
6
MaximumOutputVoltage（Vp-p）
5
4
3
2
1
0
100
MAXIMUMOUTPUTVOLTAGEvsFREQUENCYVS=5.5V
VS=5.0V
VS=2.7V
1k10k100k1M10MFrequency（Hz）
10k
VNOISE（nV/√Hz）
1k
100
NOISEvsFREQUENCY
100
INOISE（fA/√Hz）
2μV/div
10
1
0.1HzTO10HzVOLTAGENOISE
100.1
1101001k10k100k
Frequency（Hz）
1s/div
TYPICALCHARACTERISTICS（Cont.）
AtTA=+25︒C,VS=5V,VCM=VS/2,RL=10kΩ,andCL=100pF,unlessotherwisenoted.
OUTPUTSWINGvsLOADRESISTANCE
25
20
COMMON-MODEINPUTRANGE
vsREFERENCEVOLTAGE
6
OutsideofNormalOperation
REFIncreasing
5
SwingtoRail（mV）
15
10
ToNegativeRail
5
4
Output
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